package com.hmdp.service.impl;

import com.hmdp.dto.Result;
import com.hmdp.entity.SeckillVoucher;
import com.hmdp.entity.VoucherOrder;
import com.hmdp.mapper.VoucherOrderMapper;
import com.hmdp.service.ISeckillVoucherService;
import com.hmdp.service.IVoucherOrderService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.utils.RedisIdWorker;
import com.hmdp.utils.UserHolder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;

/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class VoucherOrderServiceImpl extends ServiceImpl<VoucherOrderMapper, VoucherOrder> implements IVoucherOrderService {

    @Autowired
    private RedisIdWorker    redisIdWorker;
    @Autowired
     private ISeckillVoucherService seckillVoucherService;
    @Transactional
    @Override
    public Result seckillVoucher(Long voucherId) {
        // TODO: 实现秒杀逻辑
        //判断秒杀是否开始或结束
        SeckillVoucher voucher = seckillVoucherService.getById(voucherId);
//        if (voucher.getBeginTime().isAfter(LocalDateTime.now())){
//            return  Result.fail("活动尚未开始...");
//        }
//        if (voucher.getEndTime().isBefore(LocalDateTime.now())){
//            return  Result.fail("活动已结束！");
//        }
        //判断库存是否充足
        if (voucher.getStock()<1){
            return  Result.fail("库存不足！");
        }
        //扣减库存
        boolean success = seckillVoucherService.update()
                .setSql("stock=stock-1")
                .eq("voucher_id", voucherId)
                .gt("stock",0).update();

        if (!success){
            return  Result.fail("扣减库存失败！");
        }
        //创建订单
        VoucherOrder order = new VoucherOrder();
        //订单ID
        long orderid = redisIdWorker.nextId("order");
         order.setId(orderid);
         //用户ID
        Long id = UserHolder.getUser().getId();
        order.setUserId(id);
        //秒杀商品ID
          order.setVoucherId(voucherId);
          save(order);
        //返回订单号
        return Result.ok(order);
    }
}
